E
Espartacuss
> I don't believe that this post is correct. 120/208 VAC is nominal 3 phase voltage (i.e. 120 VAC * SQRT 3) as is
> 277/480 VAC with the phase to neutral/ground voltage first.
Yeah you are correct BUT !!! And I have to emphasis this: As follows for purposes of clarification and education.
277/480volt is always 3 phase with 4 wire system
This system uses 4 physical wires
Neutral, (white striped) Hot (black, common) Blue (Blue also common) and Grounding wire conductor (color Green)
120/208volt is also a 3 phase 4 wire system
For this the grounded conductor must be white or gray only !!!
> 277/480 VAC with the phase to neutral/ground voltage first.
Yeah you are correct BUT !!! And I have to emphasis this: As follows for purposes of clarification and education.
277/480volt is always 3 phase with 4 wire system
This system uses 4 physical wires
Neutral, (white striped) Hot (black, common) Blue (Blue also common) and Grounding wire conductor (color Green)
120/208volt is also a 3 phase 4 wire system
For this the grounded conductor must be white or gray only !!!